| 摘要 |
A mathematics teaching system comprises a keyboard, for entering an arithmetic problem to be solved and includes display elements to display said problem and a solution thereto. Electronic components automatically calculate the correct step-by-step solution and provide carry-borrow information to assist the student in making his calculations and performing a step-ty-step solution. Electronic circitry and components compare the calculated step-by-step solution with each step entered by the student and generate a "try again" signal upon entry of an incorrect step by the student. Equipment operable by the student is provided to erase an incorrect step. The system can be set to operate in a manual mode comprising a step-by-step solution by the student or one of two automatic modes, one of the latter comprising the displayed solution upon the entering of the problem and the second comprising the displayed step-by-step solution upon entry of a signal by the student.
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